Question

a person spent one lakh rupees per second. how many years would be required to spent one mole rupees

Answer 1

10^5 rupees ———- 1 second
6*10^23 rupees —– T

T = 6 * 10^23 / 10^5
T = 6 * 10^18 seconds

In years,
It takes 6 * 10^18 / (3153600) = 1.90132588 * 10^11 years

Approximately 190 billion years.